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Resize image with ASP.NET

Posted on 2014-03-28
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Last Modified: 2014-03-28
Hi. After a user uploads a PNG or JPG image by using the Fileupload control, is there a way to resize such image straight with ASP.NET (vb)?

Thanks.
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Question by:SimpleDude
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Carl Tawn earned 2000 total points
ID: 39961520
Try something like the following - it's a little simplified, but shows the mechanics:
Dim image As System.Drawing.Image = System.Drawing.Image.FromStream(FileUpload1.FileContent)

Dim resized As System.Drawing.Image = New System.Drawing.Bitmap(image, New System.Drawing.Size(300, 200))
resized.Save("Somepath.png")

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Expert Comment

by:käµfm³d 👽
ID: 39961585
Be sure to add in a reference to System.Drawing.dll in order for Carl Tawn's code to work  = )
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LVL 52

Expert Comment

by:Carl Tawn
ID: 39961596
A reference to the System.Drawing assembly should be included by default, but it won't do any harm to double check ;)
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Expert Comment

by:Big Monty
ID: 39961613
Just throwing this into the mix :)

I use the component below in my classic asp pages, but the resizing part of it is written in vb.net, may be worth taking a look

http://www.imageresizing.quickersite.com/
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Author Closing Comment

by:SimpleDude
ID: 39961625
Thanks!
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